Watchcase-pendant



(No Model.)

O. W. BUBRGBR. wA'rcHoAsn PENDANT.

Patented Aug. 22, 1893.

ywergzys,

'UNITED STATES PATENT OFFICE.

OTTO W. BUERGER, OF QUINOY, ILLINOIS.

WATCHCASE-PENDANT.

SPECIFICATION forming part of Letters Patent No. 503,714, dated August22, 1893.

Application led January 31,1893. Serial No. 450.322. (No model.)

To @ZZ whom it may concern/,.-

Be it known that I, OTTO W. BUERGER, a citizen of the United States,residingat Quincy, in the county of Adams and State of Iliinois, haveinvented a new and useful Pendant-Set for Watchcases, of which thefollowing is a specification.

This invention relates to pendant sets for watchfcases, and has for itsobject to provide a novel, simple, and perfectly safe device of thecharacter set forth, that needs no adjustment after being putinoperative position, is easily pulled out and pushed back, indestructibleand convenient, and is adapted to be applied to any stem-wind case; italso has the additional advantage of being capable of use with either anopen face or hunting-case watch in large or small sizes, and allows allthe present pendant-set watch movements to be operated by it, exceptthose where movement and case are fitted up as one part and sold assuch.

lith the said objects and advantages in View, the invention consists ofthe construction and arrangement of the parts as will be more fullyhereinafter described and claimed.

In the drawings: Figure 1 is a sectional perspective ofthe stem-wind ofa watch pendant embodying the invention and showing the same employed inconnection with a rim adapted to be used with a hunting case watch,themechanism being shown depressed in full lines. Fig. 2 is an enlargedperspective view of the arbor ot' the stem -wind, showing the improvedinvention in connection therewith. Fig. 3 is a similar view of the arborof the stem-wind and the improved device, showing the two partsdetached. Fig. 1i is a vertical central sectional view of the pendantwith the mechanism elevated.

Similar numerals of reference indicate corresponding parts in theseveral views.

Referring to the drawings, the numeral 1 designates the winding arbor ofa stem-wind or pendant-set device, which is mounted in a watch pendant2, and supplied at its outer end with a crown 3, and has its inner endsuitably formed to be thrown into connection with or withdrawn from thewinding train, and to be properly thrown into engagement with thehand-operating train. W'ithin the pendant 2, at the upper and lowerportions thereof, are located stops or shoulders that are adapted to beengaged by parts of the pendant set device, formed on the arbor l, by acylindrical enlargement on said arbor, it being understood that othershoulders or circumferential grooves will be formed in the said arbor toadapt the same to be properly fitted within the pendant 2, and toposition the same relatively to the trains ot gearing. On the saidcylindrical enlargement of the arbor, and between shoulders 4 and 5, isvformed a steel tooth 6, that is oval in plan with a broad base orlowerend 7, and a tapered point or apex 8, at the upper portion thereof thatstands in or about in the central longitudinal vertical line of thearbor, and over the said cylindrical enlargement and a portion of thearbor is movably mounted a steel tube 9, that is out open lengthwise, asat 10, a part of the said opening lO being as wide as the greatest widthof the said steel tooth, as at 1l, and in which the said tooth isnormally positioned when the arbor is in engagement with the Windingtrain or mechanism. The said tooth 6, as stated, may be formed directlyupon the arbor or be secured thereto in any suitable manner, and theopening 11 in the tube 9 is in the form of a recess that lpermits thesaid tube to have loose engagement with the arbor and the tooth, but theopening 10 of the tube 9 is always held in alignment with the apex ofthe said tooth 6.

In operating the arbor by means ot the crown to disconnect the saidarbor from the winding gears, the crown with the arbor is drawn outwardor upward through the pendant casing and the tube being held againstlongitudinal movement by proper shoulders or projections at the upperandlower portions of the pendant casing, the tooth 6 is forced upwardinto the opening 10 of the tube 9, and spreads thelatter, therebyforming a positive means of holding the arbor withdrawn from engagementwith the winding-train and in operative connection with the traincontrolling the movement of the hands. In this adjustment of the arborthe tube is of such length, and the movement of the arbor is limited insuch manner, that an entire disconnection from the winding train ofgearing is obtained, and the rotation of the arbor to move the handswill in no wise conflict with ICO the winding mechanism and avoid injuryto the latter` while the hands are being set. By simply pressingdownward on the crown the arbor is forced backward into its engagingposition with the train of winding gears, and where the device isemployed in connection with a hunting-case watch is also in position tooperate the catch-spring of the case to release the same from engagementwith the lid, as will be readily understood. It will be observed in thisconnection that the tooth 6 acts as a wedge to separate or spread thespring-steel tube 9 in the operation of holding the arbor withdrawn, andit will also be seen that the binding action between the opposite sidesof the tooth and the adjacent engaging walls of the opening ll causes afirm temporary fastening by reason of the fact that the tension of thesaid tube exerted in its effort to return to its normal positionproduces a iirm binding upon the said tube. lt will also be seen thatthe opening l0, of the tube 9, has normally parallel walls, but thatwhen the tooth engages the same the said walls are spread apartoutwardly from a true parallel line on each side. A further importantfeature of the preceding construction and arrangement, as fully setforth, is the fact that the tube 0 embraces or surrounds the arborcontinuously, and that it is of equal diameter throughout its length toaccommodate this arrangement, and thereby7 form a compact structure.

The annoying end-shake and grinding action prevalent in many devices ofthis chai'- acter are entirely avoided and done away with by the presentconstruction, as the winding arbor rests in open-face cases with theshoulder iirm at the bottom of the pendant, while in hunting-cases theshoulder of the winding arbor rests against the case-spring, as fullyshown in the accompanying drawings. The steel tube rests at the bottomof the pendant, as one limitation, and on top it is held by ascrew-sleeve or analogous device that is fitted in the opening of thecase of the pendant, the said sleeve being screw-threaded, preferably,and regulates the end-shake of the tube, a small screw, for safety,being put in through the pendant and the said sleeve. For hunting-casewatches, in order to allow the lool;- spring to be pushed bacl: by thewinding arbor, it is only necessary to allow as much endshalie ormovement to the winding arbor as is required to force the lid from thelockspring. These incidental features enhance the value of theattachment by causing it to have a positive action, as well as to avoidtoo free play of the arbor, which is unnecessary and often proves amatter of considerable inconvenience and possible injury to themechanism of the watch.

Changes in the form, proportion, and the minor details of constructionmay be resorted to without departing from the principle or sacrificingany of the advantages of this invention.

Having described the invention, what is claimed as new isn l. In adevice of the character set forth, the combination of the arbor having atooth thereon, and a sleeve loosely fitted over said arbor and having anopening extending lengthwise thereof with a larger opening at one end ofthe same, said openings being engaged by the said tooth on the arbor,substantially as described.

2. ln a device ofthe character set forth, the combination of a windingarbor having a tooth thereon with an upper pointed termination or apexanda lower widened portion, and a springtube fitted over said arbor andhaving an opening extending lengthwise thereof with a larger opening atone end of the same in which the said tooth is normally seated, thesmaller of the two openings in the said tube being adapted to have thetooth forced upward thereinto to hold the arbor withdrawn fromengagement with the winding mechanism of the watch, substantially asdescribed.

3. ln a device of the character set forth, the combination of anaxially-slidable winding and setting arbor, a rotatable sleevesurrounding said arbor and held against longitudinal mdvement therewith,said sleeve being provided with a longitudinal slotor opening, and awedge-shaped tooth carried by the arbor to engage said slot or openingto expand the sleeve, substantially as specified.

In testimony that I claim the foregoing as my own l have hereto affixedmy signature in the presence of two witnesses.

OTTO lV. BUERGER.

Witnesses:

J. M. RIFENBERICK, TOM THOMPSON.

